Inspect the area around the window. Is there other damage that needs to be
repaired? If not, keep reading. If so, stop and effect the
repair now. It will be much easier going later. Obtain the molding you prefer and any of the items listed to the left that you do not
have from your local hardware store. They will be able to help you find the things
you need.

Nail to window casing first

Step 2:

Measure from the window sill to the top of the inside opening of the window.
Transfer the dimension to the molding and cut it at a 45 degree angle.
The inside part of the molding needs to be at the "short"
end of the cut. Repeat the process for the molding on the other side. Cut
the top molding to the approximate dimension necessary for the top. Make sure to
leave a little extra.

Paint/prime trim

Step 3:

It is a good idea to lightly sand the molding before priming. After the molding
has been sanded you need to "prime" the molding. Make sure your
primer is compatible with the paint you intend to use. Let
the primer dry and then coat it again.

Set nails

Step 4:

Put the molding on the window frame and, using the smaller finishing nails, first nail
the trim to the window casing. The next step is to use the longer nails to nail the
outside of the molding to the wall. Nail the other side and then "set"
the nails. Put the nail set on top of the nails and drive them down so they are
below the surface of the wood.